Improvement in cotton-gins



S. R. PARKHURST.

Cotton Gin.

itemed] April. 2z. .1858;

LMB.

- rounding or contiguous articles.

UNITED STATES PATENT OFFICE.

s. n. rAnKHUasfr, or New YORK, N. Y.

IMPROVEMENT INy COTTON-GINS.

Specification forming part of Letters Patent No. 20,086, dated April 2.7, 1858.

il) a/ZZ whom, t may concern,.-

Beit known that I, STEPHENR. PARKHURST, of the city, county, and State of New York, have invented, made, and applied to use a certain new and useful Improvement in Cotton- Gins; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making part of vthis specification, wherein- Figure I is a perspective view of my cottongin. Fig. 2 is a vertical longitudinal section, and Fig. 3 is an internal view of the gearing connecting the cylinder and stripper.

Similar marks of reference indicate the same parts. l

In roller and other cotton-gins the cylinder of teeth travels in such a manner that the cotton is carried over the top thereof back toward the brush, and the roller or stripper placed above said cylinder rotates in the same direction, so that itslower surface near the said cylinder travels in the reversev direction to the motion of the cotton to free the same and roll the mass over. This cylinder and stripper have heretefore been connected to each other by belting, which, under the strain and shortness of the belts, is apt to slip. They have also been geared together by an intermediate pinion; but in this case it becomes difficult to obtain the proper speed on the stripper, and also the said gears are exposed to catching dirt, cotton, sticks, and other obstructions, and also to becoming entangled in the clothes of the attendants, (generally negroes,) or iniiict personal injury, independent of the cost of said gears andthe trouble of fitting` the saine.

The nature of my said invention consists in connecting the stripper and grinning-cylinder with what I term an internal gear-viz., a female gear-wheel surrounding and driving the pinion on the end of the stripper-shaft-by which means the proper motion is given to the stripper from the cylinder. The two are always compelled to rotate simultaneously, and there is no chancefor the cotton to clog. There is no part of the gearing exposed, so as to become injured itself or entangled in any sur- The gearing is kept clean, and the drum formed by the internal gear gives opportunity for applying I power atthis point or taking 0E a belt to the blower.

My gin is thus compact, cheapre liable in operation, safe for the attendants, and not liable to injury.

In the drawings, a c are the side frames of the gin, of any desired character, carrying by journal-boxes the shaft l of the surface-tooth ginning-cylinder b,- also, the shaft 2 of the stripper c and the shaft 4 ofthe brush-blower d.

e e-is the case of the blower, fitted so as to be opened at top for cleaning, if necessary. f is a hopper hinged at 3 3, and provided with an adjustable bottom edge, 4, by which the mouth or opening for the escape of seed between said hopper and the frameis adjusted so as not to allow any cotton to drop out-only the seeds, sticks, &c. The cylinderstripper and blower are rotated by competent power (applied to a pulley on the shaft l) in the direction of the arrows, 'and the parts operate on the cotton in the usual manner. The motion is communicated from the shaft l of the cylinder b through the internal gear, h, acting on the pinion t on the shaft 2 of the stripper c to drive the same, as before specified; and k is a belt from the outside of the inv ternal gear-wheel, h, passing over the pulley Z on the shaft 4 of the brush-blower to drive the same, thence around the tightening-pulley m to the wheel h aforesaid. The tightening-pulley m isset in suitable slings, n, and is adapted to be adjusted in such a manner as to keep the belt tight to the pulley Z of the blower.

I do not claim the ginning-cylinder or stripper, nor the combination ofthe same with the brush-blower, eachA revolvingr in the direc- 

